Add force restore option

src/dotnet/commands/dotnet-restore/LocalizableStrings.resx

@@ -165,4 +165,7 @@
   <data name="CmdNoDependenciesOptionDescription" xml:space="preserve">
     <value>Set this flag to ignore project to project references and only restore the root project.</value>
   </data>
+  <data name="CmdForceRestoreOptionDescription" xml:space="preserve">
+    <value>Set this flag to force all dependencies to be resolved even if the last restore was successful. This is equivalent to deleting project.assets.json.</value>
+  </data>
 </root>

src/dotnet/commands/dotnet-restore/RestoreCommandParser.cs

@@ -60,6 +60,11 @@ namespace Microsoft.DotNet.Cli
                     LocalizableStrings.CmdNoDependenciesOptionDescription,
                     Accept.NoArguments()
                           .ForwardAs("/p:RestoreRecursive=false")),
+                Create.Option(
+                    "-f|--force",
+                    LocalizableStrings.CmdForceRestoreOptionDescription,
+                    Accept.NoArguments()
+                          .ForwardAs("/p:RestoreForce=true")),
                 CommonOptions.VerbosityOption());
     }
 }